Potable water: who controls what?

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Water is the food product that is subject to the most checks:this system of controls is governed by the public health code (L1321-1 to 10, R1321-1 to 68) which determines the quality standards for raw (untreated) and treated water.

Treatment in the plant and regular sanitary inspections ensure that the consumer receives safe potable water (i.e. which does not constitute a danger to health) in their homes.

Checks carried out by the Departmental directorate of health and social affairs (DDASS)

The compulsory health inspections are performed by the specialist agencies of the Department of Health.These are the Departmental directorates of health and social affairs (DDASS)

These agencies carry out two types of monitoring:

  • Complete analyses, checking nearly 70 parameters, are carried out several times a year on raw and treated water in the production plants.
  • additional analyses, focusing on a series of test parameters capable of indicating the presence or absence of abnormalities in other parameters, are carried out every month at several points of the distribution network.  

Checks made by Vannes town council 

In addition to the checks made by the Departmental directorate of health and social affairs (DDASS), Vannes town council (Water and sewage management department) conducts daily chemical analyses (around 20,000 a year on raw water and in its plants) which help guarantee the quality of the tap water. These are production self tests which all producers must perform.  In accordance with the law of 3 January 1992, all data relating to health checks made on water destined for human consumption is displayed in the town hall.



Place Maurice Marchais

Tél. : 02 97 01 60 00



Monday to Friday from 8h to 12h15 and from 13h15 to 18h.Saturday morning from 9h to 12h.



7 rue Joseph Le Brix

Tél. : 02 97 01 60 00


Ouverture :


Monday to Friday from 8h15 to 12h15 and from 13h15 to 17h.


Permanence of the state civil service, Saturday 9am to 12pm.Are given priority: the declarations of birth and death as well as passport applications (by appointment).


Saturday morning, home phone from 9h to 12h.